"I think that the only way that anyone can really have a successful relationship is if they are totally okay on their own."

In fact, the singer had made a commitment to become the best person she can possibly be!

"For me, throughout my whole life, I've just really tried to grow and strengthen myself individually and become the most happy, healthy person on my own that I can become. And then whatever the universe brings into my life, it will."

"I'm in a total workout kick now. Emma Roberts took me to a Pilates studio and I love it so much."

But sadly, being in shape means cutting out the OTHER love of her life…PIZZA!

"The reality is that food fuels you and you eat for energy. You want to eat carbs and pizza. That's like my favorite thing in the entire world but it does make you tired… My food is my fuel. It helps me with my long hours at work so I try my best to eat as healthy as I can."

Zayn previewed the duet by posting a black and white pic of himself with Swifty on his Instagram -- but hey, she is bestiez with his girlfriend Gigi Hadid, so it wouldn't be unusual that they hang out... But collab?!